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4. SAFETY OBSERVATION FUNCTION
(3) Duplication of the input wiring
(a) Duplication of the input wiring
Switch DI_A and DI_B within the mismatch permissible time.
This function continuously monitors whether signals of duplicated input are matched. The
corresponding input device will be discriminated as off when a mismatch is detected. The following
shows the operation sequence when SLS1C (SLS1 command) is assigned to DI1. SLS1C (SLS1
command) is off while DI1A and DI1B are mismatching. SLS1C (SLS1 command) is on when both
DI1A and DI1B turn on. When the mismatch continued over mismatch permissible time specified by
the parameter, [AL. 79.7 Mismatched input signal error] occurs and SS1 function operates.
DI1A
DI1B
SLS1C
(SLS1 command)
Servo amplifier
display
Operation status
(b) Parameter setting
To the input devices that are assigned by [Pr. PSD02 Input device selection DI1] to [Pr. PSD07 Input
device selection DI6], set the following parameters. Setting the mismatch permissible time to 0
disables the diagnosis.
(4) Fixing-diagnosis at start-up
When the power of MR-D30 is turned on, each input pin can be checked by turning the signal off and on
repeatedly.
An error will not occur when
mismatch time is within
permissible time.
ON
OFF
ON
OFF
ON (disabled)
OFF (enabled)
SLS in progress
Parameter No.
PSD18
PSD19
PSD20
PSD21
PSD22
PSD23
4 - 9
Input device
Mismatch permissible time
No display
Ordinary
SLS in progress
operation
Name
Mismatch permissible time
DI1
Mismatch permissible time
DI2
Mismatch permissible time
DI3
Mismatch permissible time
DI4
Mismatch permissible time
DI5
Mismatch permissible time
DI6
79.7
SS1 in progress
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